Changes between Version 9 and Version 10 of GENIEducation/SampleAssignments/CCNAssignment/ForInstructors


Ignore:
Timestamp:
06/03/13 17:41:43 (6 years ago)
Author:
shuang@bbn.com
Comment:

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  • GENIEducation/SampleAssignments/CCNAssignment/ForInstructors

    v9 v10  
    166166  Instrumentize your experiment using GEMINI following the instructions here: [http://www.protogeni.net/wiki/GeniTutorial GENIDesktop Tutorial]. [[BR]]
    167167  Log into the host collaborator1 and use the Atmos client to fetch data from 1902/01/28 to 1902/02/03. Look at the GEMINI data usage, and observe that data is pulled from both datasource1 and datasource2, through router to researcher1 and ultimately to collaborator1. Record or remember the data rates and volumes from this transaction. On the GEMINI web interface (GENIDesktop), show real-time graphs from datasource1, datasource2, router, researcher1 and collaborator1, record the throughput numbers or screenshot the graphs. [[BR]]
     168   [[Image(c1.png, 50%, nolink)]] [[BR]]
     169   As we can see here, collaborator1 first gets the data from 1902/01/28 to 1902/01/31 from datasource1 through router and researcher1; then gets the data from 1902/02/01 until 1902/02/03 from datasource2 through router and researcher1.
    168170   - '''Question 1.3 A:''' [[BR]]
    169    Log into ''collaborator2'' and fetch the same dates. Which hosts transfer data? why?
     171   Log into ''collaborator2'' and fetch the same dates. Which hosts transfer data? why? [[BR]]
     172   '''Answer:''' [[BR]]
     173   [[Image(c2.png, 50%, nolink)]] [[BR]]
     174   As we can see from the graph, collaborator2 fetches the data purely from researcher1 since researcher1 has cached all the data in that time range. [[BR]]
    170175   - '''Question 1.3 B''' [[BR]]
    171    Now fetch 1902/01/25 to 1902/01/31 from ''researcher2''. How does this transfer differ from the previous two? why?
     176   Now fetch 1902/01/25 to 1902/01/31 from ''researcher2''. How does this transfer differ from the previous two? why? [[BR]]
     177   '''Answer:''' [[BR]]
     178   [[Image(r2.png, 50%, nolink)]] [[BR]]
     179   It seems that researcher2 got the data from datasource1 and datasource2 through router. Since there is some overlap in the time range (from 1902/01/28 until 1902/01/31), in theory, researcher2 should get the non-overlap data from datasource and the overlap data from router's cache. We can not really see the details from the GEMINI generated graphs.
    172180
    173181 - '''3.2 Choosing Content Names'''  -- Files to download: [http://www.gpolab.bbn.com/experiment-support/CCNExampleExperiment/naming.rspec naming.rspec], [http://www.gpolab.bbn.com/experiment-support/CCNExampleExperiment/ccnx-atmos.tar.gz ccnx-atmos.tar.gz] [[BR]]